Radio selective-calling receiver

Abstract

A radio selective-calling receiver, which avoids the influence of the noise and the deterioration of the characteristic of a radio section generated at the time when a received calling is informed to a user, and avoids the increase of cost and the large sized apparatus, is provided. At the time when the radio section is on state, a vibrator is separated from a power supply and the operation noise of the vibrator is not transmitted to the line of the power supply and the voltage drop of the power supply by the current of the vibrator is not also generated.

What is claimed is:  
     
       1. A radio selective-calling receiver, comprising: 
       a radio section adapted to receive and demodulate incoming radio messages;  
       a controller receiving as inputs an output of the radio section and an operator input, the controller controlling the radio section to intermittently alternate between enabled and disabled states; and  
       an indicator controlled by the controller to be inactive except when an incoming radio message addressed to the selective-calling receiver is received;  
       wherein for each incoming radio message addressed to the selective-calling receiver, the controller repeatedly alternates between enabling the radio section and enabling the indicator so that only one of the radio section and the indicator is enabled at any time, the controller continuing the repeated alternation until an indicator termination condition is reached, at which point the indicator is made inactive until a next said incoming radio message addressed to the selective-calling receiver is received.  
     
     
       2. The radio selective-calling receiver of  claim 1 , wherein the indicator termination condition is reached when either a predetermined period of time has passed or the operator input is received. 
     
     
       3. The radio selective-calling receiver of  claim 2 , wherein the indicator comprises one of a vibrator, a speaker, and a LED. 
     
     
       4. The radio selective-calling receiver of  claim 1 , wherein the controller generates a radio section control signal which is received as an input by the radio section, an indicator control signal which is received as an input by the indicator, and a receiving information signal; 
       wherein the receiving information signal is made active when an incoming radio message addressed to the selective-calling receiver is detected and made inactive when the indicator termination condition is reached.  
     
     
       5. The radio selective-calling receiver of  claim 4 , wherein the indicator termination condition is reached when either a predetermined period of time has passed or the operator input is received. 
     
     
       6. The radio selective-calling receiver of  claim 5 , wherein the controller puts the indicator control signal in an active state only when the receiving information signal is active and the radio section control signal is inactive. 
     
     
       7. The radio selective-calling receiver of  claim 6 , wherein the indicator comprises one of a vibrator, a speaker, and a LED. 
     
     
       8. The radio selective-calling receiver of  claim 1 , wherein the controller controls the indicator by selectively closing and opening a connection between the indicator and a power supply.